Use IgnoreLanguage as workaround for #6705.

5 files changed, 14 insertions, 2 deletions

diff --git a/src/test/burn/TestData/DependencyTests/PackageDv1/Package.wxs b/src/test/burn/TestData/DependencyTests/PackageDv1/Package.wxs
index e3089c7c..48e78191 100644
--- a/src/test/burn/TestData/DependencyTests/PackageDv1/Package.wxs
+++ b/src/test/burn/TestData/DependencyTests/PackageDv1/Package.wxs
@@ -12,7 +12,10 @@
 
 <Wix xmlns="http://wixtoolset.org/schemas/v4/wxs" xmlns:dep="http://wixtoolset.org/schemas/v4/wxs/dependency">
   <Package Name="~$(var.TestGroupName) - $(var.PackageName)" Language="1033" Version="$(var.Version)" Manufacturer="Microsoft Corporation" UpgradeCode="$(var.UpgradeCode)" Compressed="yes" ProductCode="$(var.ProductCode)" Scope="perUser">
+    <!-- Temporary workaround for https://github.com/wixtoolset/issues/issues/6705
     <MajorUpgrade Schedule="afterInstallInitialize" DowngradeErrorMessage="A newer version of [ProductName] is already installed." />
+    -->
+    <MajorUpgrade Schedule="afterInstallInitialize" DowngradeErrorMessage="A newer version of [ProductName] is already installed." IgnoreLanguage="yes" />
     <?ifndef CabPrefix?>
     <MediaTemplate EmbedCab="yes" />
     <?else?>
diff --git a/src/test/burn/TestData/Templates/Package.wxs b/src/test/burn/TestData/Templates/Package.wxs
index c7597131..3d4f308c 100644
--- a/src/test/burn/TestData/Templates/Package.wxs
+++ b/src/test/burn/TestData/Templates/Package.wxs
@@ -12,7 +12,10 @@
 
 <Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
   <Package Name="~$(var.TestGroupName) - $(var.PackageName)" Language="1033" Version="$(var.Version)" Manufacturer="WixToolset" UpgradeCode="$(var.UpgradeCode)" Compressed="yes" ProductCode="$(var.ProductCode)">
+    <!-- Temporary workaround for https://github.com/wixtoolset/issues/issues/6705
     <MajorUpgrade DowngradeErrorMessage="A newer version of [ProductName] is already installed." />
+    -->
+    <MajorUpgrade DowngradeErrorMessage="A newer version of [ProductName] is already installed." IgnoreLanguage="yes" />
     <?ifndef CabPrefix?>
     <MediaTemplate EmbedCab="yes" />
     <?else?>
diff --git a/src/test/burn/TestData/Templates/PackageFail.wxs b/src/test/burn/TestData/Templates/PackageFail.wxs
index b3e59540..7f2ba55c 100644
--- a/src/test/burn/TestData/Templates/PackageFail.wxs
+++ b/src/test/burn/TestData/Templates/PackageFail.wxs
@@ -8,7 +8,10 @@
 
 <Wix xmlns="http://wixtoolset.org/schemas/v4/wxs" xmlns:util="http://wixtoolset.org/schemas/v4/wxs/util">
   <Package Name="~$(var.TestGroupName) - $(var.PackageName)" Language="1033" Version="$(var.Version)" Manufacturer="WixToolset" UpgradeCode="$(var.UpgradeCode)" Compressed="yes">
+    <!-- Temporary workaround for https://github.com/wixtoolset/issues/issues/6705
     <MajorUpgrade DowngradeErrorMessage="A newer version of [ProductName] is already installed." />
+    -->
+    <MajorUpgrade DowngradeErrorMessage="A newer version of [ProductName] is already installed." IgnoreLanguage="yes" />
     <MediaTemplate EmbedCab="yes" />
 
     <PropertyRef Id="TestVersion" />
diff --git a/src/test/burn/TestData/Templates/PackagePerUser.wxs b/src/test/burn/TestData/Templates/PackagePerUser.wxs
index daac7658..36dc8069 100644
--- a/src/test/burn/TestData/Templates/PackagePerUser.wxs
+++ b/src/test/burn/TestData/Templates/PackagePerUser.wxs
@@ -12,7 +12,10 @@
 
 <Wix xmlns="http://wixtoolset.org/schemas/v4/wxs">
   <Package Name="~$(var.TestGroupName) - $(var.PackageName)" Language="1033" Version="$(var.Version)" Manufacturer="WixToolset" UpgradeCode="$(var.UpgradeCode)" Compressed="yes" ProductCode="$(var.ProductCode)" Scope="perUser">
+    <!-- Temporary workaround for https://github.com/wixtoolset/issues/issues/6705
     <MajorUpgrade DowngradeErrorMessage="A newer version of [ProductName] is already installed." />
+    -->
+    <MajorUpgrade DowngradeErrorMessage="A newer version of [ProductName] is already installed." IgnoreLanguage="yes" />
     <?ifndef CabPrefix?>
     <MediaTemplate EmbedCab="yes" />
     <?else?>
diff --git a/src/wix/WixToolset.Core.Burn/Bundles/CreateBurnManifestCommand.cs b/src/wix/WixToolset.Core.Burn/Bundles/CreateBurnManifestCommand.cs
index 19dc7933..c8f10a71 100644
--- a/src/wix/WixToolset.Core.Burn/Bundles/CreateBurnManifestCommand.cs
+++ b/src/wix/WixToolset.Core.Burn/Bundles/CreateBurnManifestCommand.cs
@@ -538,9 +538,9 @@ namespace WixToolset.Core.Burn.Bundles
                         }
                         writer.WriteAttributeString("OnlyDetect", related.OnlyDetect ? "yes" : "no");
 
-                        var relatedLanguages = related.Languages.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
+                        var relatedLanguages = related.Languages?.Split(new[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
 
-                        if (0 < relatedLanguages.Length)
+                        if (null != relatedLanguages && 0 < relatedLanguages.Length)
                         {
                             writer.WriteAttributeString("LangInclusive", related.LangInclusive ? "yes" : "no");
                             foreach (string language in relatedLanguages)